swett



Patented Peb. 1o, 185.2.v

J. H. SWETT. QUARTZ GRUSHER.

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Specification of Letters Patent No. 8,727', dated February 10, 1852.

To all whom 'it may concern:

Be it known that I, JAMES II. SWETT, o-f Boston, in the county of Suffolk `and State of Massachusetts, have invented certain new and useful Improvements in Machines for Crushing and Grinding Quartz, Glass, and other Material; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part thereof, in whic Figure 1, represents a side view of my crushing apparatus, with a portion of the cylinder broken away, to show the internal arrangement. Fig. 2, represents one of the curved arms for catching, carrying up, and throwing over the metallic balls, by which the material is broken, ground, or crushed in the cylinder.

Similar letters `in both the figures represent the same parts.

The nature of my invention consists, in

i arranging a metallic cylinder, which may be round, or many-sided, into which the material to be operated upon is placed, and which has a rotary motion in one direction; and passing through said cylinder, a shaft carrying any suitable number of curved arms, which have a rotary motion, in a direction contrary to that of the cylinder, and which catch up, carry, and throw over a series of metallic balls, by which the material to be ground or crushed is operated upon.

` To enable others skilled in the art to make and use my invention I will proceed to describe the same with reference to the drawings.

In crushing quartz rock, it has been found unless the material be shaken, or loosened up, after every few blows of the crushing apparatus, that it becomes so packed do-wn and cemented, as to render all power machines practically inoperative for this purpose. To remedy this defect, I

`have devised the following described apparatus. On a suitable wood, or metallic frame A, I place the bearings B, for the Shaft C, to turn freely in; and on the same frame IA arrange another shaft at right angles to the shaft C, upc-n which is placed a bevel wheel D, which mashes into and turns in opposite direct-ions the bevel gear E, F. The bevel gear E, is secured to the shaft in any well known manner, and rotates said shaft. The bevel gear F, is attached to the end of the cylinder Gi, and rotates said cylinder in a direction contrary to said shaft. The shaft or axis on which the bevel gear F, is placed, is hollow, andthe shaft- C, passes through it, in the well known manner of arranging shafts which havefl contrary motions.

On the shaft C, I arrange any suitable number of arms H, which terminate in curves of Such size as to cat-ch up, carry around, and throw a suitable number of metallic balls I, which fall with sutHcient` force to gradually grind or crush the material in the cylinder. The arms II are provided with set screws J, by which they may be so set on the Shaft, in a more direct Vor spiral line, as that they shall carry up one, two or `more balls at a time, thus giving to the machine a regular or graduated mo tion, according to the power applied. Vhile the balls are being thus operated, the material in the cylinder by the rotation thereof, is loosened up, by being car-vV ried upwith the cylinder, and falling back by its own gravity, so that the ballsA are constantly falling on fresh material, which is as constantly changing place; the larger particles being by this motion, thrown to the surface where the balls strike them with the greatest force. The cylinder may be perforated with small holes, answering the purpose of a screen, through which the material that is sufliciently ground may pass as soon as it becomes ne enough, thus preventing -itfrom being mixed up with the larger particles, and deadening the force 'of the balls.

One end of the cylinder, around the shaft, may be left suliiciently open to throw in the materiahor, a sliding door may be made therein through which the cylinder may be charged, andothen closed. The 4machine may be operated, by horse, steam, water or any other power. i

I-Iaving thus fully described the nature of my invention what I claim therein as new, and desire to secure by Letters Patent, is-

In combination with a cylinder containing the quartz, &c., and rotating in one direction for the purpose of loosening up the ranged and combined in the manner, and ymaterial to be ground or crushed,-the for the purpose, herein fully set forth.

curved arms arranged upon a shaft therein, Y rotating in a contrary direction, for the 5 purpose of catching, carrying up, and throW- Witnesses:

ing over the balls by which said material A. B. STOUGHTON, is ground or crushed, the Whole being ar T. C. DONN.

' JAMES H. sWETT. f 

